Epipinoresinol

DL-Epipinoresinol (XX) accompanies the DL-pinoresinol in a small amount 25). Here the configuration at one benzyl carbon atom is inverted to form an axial-equatorial system 35). 

Arctiin, phillyrin, epipinoresinol-4 -y -D-glucosidc, mutuiresonide, and pinoresinol 4-/i-D-glucoside... 

The occurrence of p- 3 structures of types 27 and 28 has been considered [2], Epipinoresinol structures (27) have not been detected in lignins [75], while structures of type 28 have been found to be present in a grass lignin [76], The formation of... 

Lignans together with other allelochemicals may play a role in synergising antifeedant or insecticidal properties. Sesamin and asirin showed synergistic properties with pyrethrum insecticides [2], Pinoresinol, bis-epipinoresinol, the hemicetal and the diacid isolated from the Brazilian... 

TLC has been finding increasing application in the sphere of wood research. Using chloroform-ethyl acetate (90 + 10) on silica gel G layers, Freijdenberg and Sidhu [54] have separated (+)-sesamin, xRf 78 (-f)-asarinin, 87 (+)-epiasarinin, 93 from (+)-pinoresinol dimethyl ether, 47 and (+)-epipinoresinol dimethyl ether, 55. After spraying with formalin-sulphuric acid (1 + 9) and heating to 110° C, the... 

The anticomplementary activity of 19 lignoids obtained from the bark of Eucommia ulmoides Oliver (Eucommiaceae) was evaluated by Oshima et al. [27]. (+)-Syringaresinol monoglucoside (42), (+)-medioresinol monoglucoside (eucommin A) (43) and (-)-epipinoresinol (44) were active as inhibitors of the classical pathway (inhibition between 25 and 30%) at a concentration of 1.5 mg/ml or about 3 pM. 

The preparation of 21 (Chart 3) by selenium dehydrogenation of the dimethyl ethers of pinoresinol (22) and epipinoresinol (23) was reported (22) prior to the isolation of the furoguaiacins (1.9a, b) from a natural... 

Lignans. ( + )-Epipinoresinol hydrogenated with Pd in ethyl acetate at room temp, until 2 moles of have been absorbed ( —)-secoisolariciresinol. Y almost 100%. Also from ( + )-pinoresinol, and f. e. s. K. Weinges, B. 94, 2522 (1961). 

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